# Distance

points = [float(i) for i in input().rstrip().split()]
a = [points[0], points[1]]
b = [points[2], points[3]]

distanceSquare = (a[0] - b[0]) ** 2 + (a[1] - b[1]) ** 2
distance = distanceSquare ** 0.5

print(distance)
 float(i) for i in input().rstrip().split() for i in input().rstrip().split() i input().rstrip().split() ().rstrip().split ().rstrip() ().rstrip () input rstrip split for i in input().rstrip().split() float(i) float i points = [float(i) for i in input().rstrip().split()] points [float(i) for i in input().rstrip().split()] a = [points[0], points[1]] a [points[0], points[1]] points[0] points 0 points[1] points 1 b = [points[2], points[3]] b [points[2], points[3]] points[2] points 2 points[3] points 3 distanceSquare = (a[0] - b[0]) ** 2 + (a[1] - b[1]) ** 2 distanceSquare (a[0] - b[0]) ** 2 + (a[1] - b[1]) ** 2 (a[0] - b[0]) ** 2 a[0] - b[0] a[0] a 0 b[0] b 0 2 (a[1] - b[1]) ** 2 a[1] - b[1] a[1] a 1 b[1] b 1 2 distance = distanceSquare ** 0.5 distance distanceSquare ** 0.5 distanceSquare 0.5 print(distance) print distance b = [points[2], points[3]] [points[2], points[3]] b distanceSquare = (a[0] - b[0]) ** 2 + (a[1] - b[1]) ** 2 (a[0] - b[0]) ** 2 + (a[1] - b[1]) ** 2 distanceSquare points = [float(i) for i in input().rstrip().split()] [float(i) for i in input().rstrip().split()] points distance = distanceSquare ** 0.5 distanceSquare ** 0.5 distance a = [points[0], points[1]] [points[0], points[1]] a
# Distance

points = [float(i) for i in input().rstrip().split()]
a = [points[0], points[1]]
b = [points[2], points[3]]

distanceSquare = (a[0] - b[0]) ** 2 + (a[1] - b[1]) ** 2
distance = distanceSquare ** 0.5

print(distance)

